JPS6362322B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of brazing a chip to a cutter such as a hole cutter or a rotary cutter.

When brazing a chip to the cutter tube of a hole cutter, conventionally, as shown in FIG. There is a method in which each inner surface of each chip T is brought into contact with the outer circumferential surface of the core metal 2 and the positioning thereof is carried out sequentially, or a method in which the cutter barrel 1 is held horizontally and rotatably supported as shown in FIG. The core bar 3 is partially inscribed in the upper part of the cutter barrel 1, and while rotating the cutter barrel 1 intermittently, the lower surface of each tip T is brought into contact with the upper surface of the core bar 3 one after another to determine its position. I found a way to do it.

However, with these mounting methods, when installing the tip T, the core metals 2 and 3 must be inserted into the cutter tube 1 and then removed from the cutter tube 1 after installation, so it is difficult to improve the efficiency of the tip attachment work. Not only is it not possible to do this, but the core metals 2 and 3 may become misaligned with respect to the cutter barrel 1 while attaching multiple chips T in sequence.
Therefore, there was a problem that the mounting position of the chip T was not accurate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for attaching a tip to a cutter, which allows the tip to be attached to a cutter body efficiently and accurately without using a metal core.

Hereinafter, an embodiment of the present invention in a hole cutter will be explained with reference to FIG. 3 and below. As shown in FIG. 5, 11 and 12 are chip materials,
The thickness W of these chips is slightly thicker than that of an ordinary chip T. Reference numeral 13 denotes a pair of upper and lower positioning protrusions integrally provided on the side surface 14 on the rearward side in the rotational direction of each chip material 11, 12, both of which are located at the outer edges of the chip materials 11, 12.

15 is a cutter barrel (cutter body) of a hole cutter for attaching the above-mentioned chip materials 11 and 12;
Reference numeral 16 indicates a plurality of mounting recesses formed on the peripheral edge of the tip, and are for brazing the chip materials 11 and 12. 17 is a blade bag formed in front of each mounting recess 16, and 18 is a discharge groove formed to extend obliquely from a position corresponding to each blade bag 17 on the outer peripheral surface of the blade barrel 15 toward its base end. .

When attaching the above-described tip materials 11 and 12 to the cutter barrel 15, as shown in FIG. A pair of positioning protrusions 13 on the rear surface 14 are brought into contact with the outer peripheral surface of the cutter barrel 15. As a result, the chip materials 11 and 12 are not displaced in the radial direction with respect to the cutter barrel 15, and are accurately positioned.

Therefore, if each chip material 11, 12 is brazed to the cutter barrel 15 in this state, the chip materials 11, 1
Position 2 will never go out of order.

In this brazed state, each chip material 1
The outer portions 1 and 12 and the positioning protrusion 13 protrude outward from the outer peripheral surface of the cutter barrel 15.

After brazing, the outer protruding portions of each chip material 11, 12, including the positioning protrusions 13, are polished and removed. As a result, each of the tip materials 11 and 12 is raised to the tip T as shown in FIGS. 3 and 4, and the attachment of the tip T to the cutter barrel 15 is completed.

In the embodiment described above, a pair of positioning projections 13 are provided on one side surface 14 of each chip material 11, 12, but these projections 13 may be provided on different surfaces, for example, the rear surface 14 and the lower surface.

Note that the number of positioning protrusions 13 is not limited to two, and may be formed into a protrusion so as to connect both the upper and lower protrusions 13.

Therefore, the above-described attachment method does not require the use of a core metal, and has the effect of efficiently and accurately attaching the tip to the cutter barrel, making it a preferred invention for industrial use as a method for attaching tips to cutters.

[Brief explanation of drawings]

Figures 1 and 2 are schematic diagrams showing the conventional method for attaching tips, Figure 3 is a partially cutaway front view of a cutter cylinder with a tip attached by the method of the present invention, and Figure 4 is a plan view as well. FIG. 5 is a partially enlarged perspective view of the chip material attached to the cutter barrel. Chip material...11, 12, positioning protrusion...
13. Knife barrel...15.

Claims (1)

[Claims] 1. Positioning protrusions 13 are provided on the surfaces of the tip materials 11 and 12 so as to come into contact with the side surfaces of the cutter body, and when attaching the tip materials 11 and 12 to the cutter body, the positioning protrusions 13 Chip materials 11 and 12 are placed in contact with the side surfaces of
is positioned, and in this state, the chip material 11,
12 is brazed to the cutter body, and then the side portions of the tip materials 11 and 12 including the positioning protrusions 13 are cut off. 2 The cutter body is a cutter barrel of a hole cutter, and the positioning protrusion 13 is connected to the tip materials 11 and 12.
A method for attaching a tip to a cutter according to claim 1, characterized in that a pair of upper and lower protrusions are provided on the side surface 14 on the trailing side in the rotational direction.